A boy and a girl were destined to be together since birth. A long time ago, two best friends each had a child. One named his son Li Zheng, which means “attention,” and the other named his daughter Shao Xi, which means “at ease” in military terminology. The two kids grew up to embody their names, with Li Zheng being diligent and paying extra attention to everything he wants to achieve in life and Shao Xi being more laid back and lazy in her approach to life and school. When Li Zheng returns to Taiwan after growing up in Japan, he meets Shao Xi for the first time in high school. Despite their polar opposite personalities, the strong pull of their fates bring them together. Can they each adapt to be with each other or will the strong forces of life keep the two apart?

Eun Ha-Won is a college student. She is a bright girl who wants to be a veterinarian, but at home she is lonely. She is isolated from her family members. Eun Ha-Won lives with father, step-mother and step-sister after her mother died in a car accident. One day, she helps a mysterious old man. The old man suggests to her to live in a mansion and pursue her dream of becoming a veterinarian. Since than, she moves into the mansion and lives with three cousins Kang Ji-Woon, Kang Hyun-Min, Kang Seo-Woo and their bodyguard Lee Yoon-Sung.